US3142212A - Pliers - Google Patents

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Publication number
US3142212A
US3142212A US264616A US26461663A US3142212A US 3142212 A US3142212 A US 3142212A US 264616 A US264616 A US 264616A US 26461663 A US26461663 A US 26461663A US 3142212 A US3142212 A US 3142212A
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Prior art keywords
jaw
pliers
shank
jaws
pivoted
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US264616A
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Leonard E Grape
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
    • B25B7/06—Joints
    • B25B7/10—Joints with adjustable fulcrum

Definitions

  • This invention relates generally to pliers and particularly to pliers that are adjustable for gripping articles of various sizes and shapes.
  • Pliers of various types are well known in the art. Pliers in general are used for cutting or gripping. In some pliers, the relationship of the jaws is fixed; in others, the gap between the jaws is adjustable. In the adjustable type, the gap usually is adjusted in steps and the adjustment mechanism is relatively complicated and expensive.
  • the instant invention is a continuously adjustable pair of pliers, the adjustment mechanism consisting simply of slidable cam and tapered surfaces that may be adjusted with one hand.
  • FIGURE 1 is a side elevation View of the pliers
  • FIGURE 2 is a sectional view taken on line 2-2 of FIGURE 1;
  • FIGURE 3 is a sectional view taken on line 3-3 of FIGURE 2, showing the pliers unlocked;
  • FIGURE 4 is a sectional view similar to FIGURE 3, showing the locking action.
  • Element 10 includes curved handle portion 14 at one end, laterally extending, fixed jaw 16 at the other end, and tapered shank 18 between handle portion 14 and jaw 16. Tapered shank 18 is smaller at the jaw end and larger at the handle end to prevent inadvertent sliding of said second plier element in a direction away from said jaw 16 when the pliers are manually clasped upon a workpiece.
  • Element 12 includes curved handle portion 20 at one end, laterally extending, pivoted jaw 22 at the other end, and slotted portion 24 between handle portion 20 and jaw 22. Jaw
  • slotted portion 24 has a convex cam surface 30 opposite side 32 of tapered shank 18.
  • Flier elements 10 and 12 are assembled by inserting jaw 16 and shank 18 into slotted portion 24-.
  • handle portions 14 and 20 are separated as shown in FIGURE 3, cam surfaces 26 and 3d are disengaged from shank 18 and element 12 may he slid along element It) to adjust the gap between jaws 16 and 22.
  • handle portions 14 and 20 are gripped together and pivoted jaw 22 is locked in place as shown in FIGURE 4.
  • pivoted jaw 22 is held rigidly in place by the pressure of cam surfaces 26 and 3% on shank 18 at locking points 34 and 36.
  • shank 18 and cam surfaces 26 and 3d are such that looking points 34 and 36 shift for each edjustment, and jaws 16 and 22 are locked in parallel relationship for all adjustments.
  • tapered shank 18 is larger than slotted portion 24, preventing element 12 from engaging the handle portion of element 10.
  • the instant invention is a continuously adjustable pair of pliers that may be easily manipulated with one hand.
  • a first element having a fixed jaw and a tapered shank with side walls diverging from said jaw;
  • a second element having a pivoted jaw and a slotted portion, said jaw and slotted portion having opposing convex cam surfaces, said tapered shank being slidably received between said cam surfaces for adjusting the gap between said fixed and pivoted jaws and keeping said jaws parallel, said taper inhibiting inadvertent sliding of said second element along said shank in a direction away from said fixed jaw when said jaws are clamped upon a workpiece.
  • a first element having a handle portion at one end, a laterally extending, fixed jaw at the other end, and a tapered shank intermediate said handle portion and jaw, said shank being larger at the handle end and smaller at the jaw end;
  • a second element having a handle portion at one end, a laterally extending pivoted jaw at the other end, and a slot extending from said pivoted jaw toward the second mentioned handle, said tapered shank extending through said slot, said pivoted jaw having a convex cam surface engaging one side of said shank, and said slot having a convex cam surface engaging the opposite side of said shank, said taper inhibiting inadvertent sliding of said second element along said shank in a direction away from said fixed jaw when said jaws are clamped upon a workpiece.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)

Description

July 28, 1964 'L.'E. GRAPE 3,142,212
Filed Ma I 'ch 12, 1963 .INVENTOR.
L EONARD E. GRAPE United States Patent 3,142,212 PILIERS Leonard E. Grape, 11754 Moreno Ave, Lakeside, Calif. Fiied Mar. 12, 1963, Ser. No. 264,616 2 Ciaims. (Cl. 81-3835) This invention relates generally to pliers and particularly to pliers that are adjustable for gripping articles of various sizes and shapes.
Background Pliers of various types are well known in the art. Pliers in general are used for cutting or gripping. In some pliers, the relationship of the jaws is fixed; in others, the gap between the jaws is adjustable. In the adjustable type, the gap usually is adjusted in steps and the adjustment mechanism is relatively complicated and expensive.
The instant invention is a continuously adjustable pair of pliers, the adjustment mechanism consisting simply of slidable cam and tapered surfaces that may be adjusted with one hand.
Objects It is a principal object of this invention to provide a pair of adjustable pliers having one jaw adjustably slidable along a shank tapered to inhibit inadvertent sliding thereon when the pliers are manually clasped upon a work piece such as a nut.
It is a principal object of this invention to provide a pair of slidably adjustable pliers that may be adjusted with one hand.
It is another object of this invention to provide a pair of pliers that may be cheaply and rapidly assembled by slidably engaging the two plier elements.
It is still another object of this invention to provide a pair of adjustable pliers in which the jaws remain parallel for all adjustments by means of unique cam action.
With these and other objects definitely in view, this invention consists in the novel combination and arrangement of elements as will be hereinafter fully described in the specification, particularly pointed out in the claims, and illustrated in the drawings that form a material part of this disclosure, and in which:
FIGURE 1 is a side elevation View of the pliers;
FIGURE 2 is a sectional view taken on line 2-2 of FIGURE 1;
FIGURE 3 is a sectional view taken on line 3-3 of FIGURE 2, showing the pliers unlocked; and
FIGURE 4 is a sectional view similar to FIGURE 3, showing the locking action.
Similar characters of reference indicate similar or identical elements and portions throughout the views of the drawing.
Detailed Description In the drawing, the instant invention comprises first and second plier elements and 12. Element 10 includes curved handle portion 14 at one end, laterally extending, fixed jaw 16 at the other end, and tapered shank 18 between handle portion 14 and jaw 16. Tapered shank 18 is smaller at the jaw end and larger at the handle end to prevent inadvertent sliding of said second plier element in a direction away from said jaw 16 when the pliers are manually clasped upon a workpiece. Element 12 includes curved handle portion 20 at one end, laterally extending, pivoted jaw 22 at the other end, and slotted portion 24 between handle portion 20 and jaw 22. Jaw
'ice
22 has a convex cam surface 26 opposite side 28 of tapered shank 18, while slotted portion 24 has a convex cam surface 30 opposite side 32 of tapered shank 18.
Flier elements 10 and 12 are assembled by inserting jaw 16 and shank 18 into slotted portion 24-. When handle portions 14 and 20 are separated as shown in FIGURE 3, cam surfaces 26 and 3d are disengaged from shank 18 and element 12 may he slid along element It) to adjust the gap between jaws 16 and 22. When the desired adjustment is accomplished, handle portions 14 and 20 are gripped together and pivoted jaw 22 is locked in place as shown in FIGURE 4. Here pivoted jaw 22 is held rigidly in place by the pressure of cam surfaces 26 and 3% on shank 18 at locking points 34 and 36.
The relative shape of shank 18 and cam surfaces 26 and 3d are such that looking points 34 and 36 shift for each edjustment, and jaws 16 and 22 are locked in parallel relationship for all adjustments. At the handle end tapered shank 18 is larger than slotted portion 24, preventing element 12 from engaging the handle portion of element 10.
From the foregoing description, it is readily apparent that, by a unique combination of tapered and earn surfaces, the instant invention is a continuously adjustable pair of pliers that may be easily manipulated with one hand.
It is understood that minor variation from the form of the invention disclosed herein may be made without departure from the spirit and scope of the invention, and that the specification and drawing are to be considered illustrative rather than limiting.
I claim:
1. In a pair of pliers, the combination comprising:
a first element having a fixed jaw and a tapered shank with side walls diverging from said jaw; and
a second element having a pivoted jaw and a slotted portion, said jaw and slotted portion having opposing convex cam surfaces, said tapered shank being slidably received between said cam surfaces for adjusting the gap between said fixed and pivoted jaws and keeping said jaws parallel, said taper inhibiting inadvertent sliding of said second element along said shank in a direction away from said fixed jaw when said jaws are clamped upon a workpiece.
2. In a pair of pliers, the combination comprising:
a first element having a handle portion at one end, a laterally extending, fixed jaw at the other end, and a tapered shank intermediate said handle portion and jaw, said shank being larger at the handle end and smaller at the jaw end; and
a second element having a handle portion at one end, a laterally extending pivoted jaw at the other end, and a slot extending from said pivoted jaw toward the second mentioned handle, said tapered shank extending through said slot, said pivoted jaw having a convex cam surface engaging one side of said shank, and said slot having a convex cam surface engaging the opposite side of said shank, said taper inhibiting inadvertent sliding of said second element along said shank in a direction away from said fixed jaw when said jaws are clamped upon a workpiece.
References Cited in the file of this patent UNITED STATES PATENTS

Claims (1)

1. IN A PAIR OF PLIERS, THE COMBINATION COMPRISING: A FIRST ELEMENT HAVING A FIXED JAW AND A TAPERED SHANK WITH SIDE WALLS DIVERGING FROM SAID JAW; AND A SECOND ELEMENT HAVING A PIVOTED JAW AND A SLOTTED PORTION, SAID JAW AND SLOTTED PORTION HAVING OPPOSING CONVEX CAM SURFACES, SAID TAPERED SHANK BEING SLIDABLY RECEIVED BETWEEN SAID CAM SURFACES FOR ADJUSTING THE GAP BETWEEN SAID FIXED AND PIVOTED JAWS AND KEEPING SAID JAWS PARALLEL, SAID TAPER INHIBITING SAID SHANK IN A DIRECTION AWAY FROM SAID FIXED JAW WHEN SAID JAWS ARE CLAMPED UPON A WORKPIECE.
US264616A 1963-03-12 1963-03-12 Pliers Expired - Lifetime US3142212A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097728A1 (en) * 1982-06-25 1984-01-11 Bessey & Sohn GmbH. & Co. Clamping or gripping device of the pliers type
US4934222A (en) * 1985-07-24 1990-06-19 Snap-On Tools Corporation Ergonomic tool
US5020399A (en) * 1990-03-12 1991-06-04 Snap-On Tools Corporation Self-adjusting pliers with curved handles
US5931067A (en) * 1997-07-25 1999-08-03 Gold; Lorne Self adjusting pliers
US5954746A (en) * 1997-10-09 1999-09-21 Ethicon Endo-Surgery, Inc. Dual cam trigger for a surgical instrument
US20090056510A1 (en) * 2006-03-03 2009-03-05 American Grease Stick Company Hand operated gripping tool
US20090178518A1 (en) * 2006-03-03 2009-07-16 American Grease Stick Company Hand operated gripping tool
US20150007700A1 (en) * 2013-07-02 2015-01-08 Nigel Buchanan Plier apparatus
US20150013507A1 (en) * 2013-07-02 2015-01-15 Ibt Holdings, Llc Pliers apparatus
US9010222B2 (en) 2012-02-06 2015-04-21 Ags I-Prop, Llc Adjustable gripping tool
USD744306S1 (en) 2011-12-16 2015-12-01 Ags I-Prop, Llc Pliers with trigger
US20160144488A1 (en) * 2013-10-04 2016-05-26 Nigel Buchanan Pliers apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490902A (en) * 1922-04-18 1924-04-22 Allen C Allan Pliers, wrench, and the like
US1730722A (en) * 1927-03-25 1929-10-08 Campbell Samuel Fletcher Wrench

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1490902A (en) * 1922-04-18 1924-04-22 Allen C Allan Pliers, wrench, and the like
US1730722A (en) * 1927-03-25 1929-10-08 Campbell Samuel Fletcher Wrench

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0097728A1 (en) * 1982-06-25 1984-01-11 Bessey & Sohn GmbH. & Co. Clamping or gripping device of the pliers type
US4934222A (en) * 1985-07-24 1990-06-19 Snap-On Tools Corporation Ergonomic tool
US5020399A (en) * 1990-03-12 1991-06-04 Snap-On Tools Corporation Self-adjusting pliers with curved handles
US5931067A (en) * 1997-07-25 1999-08-03 Gold; Lorne Self adjusting pliers
US5954746A (en) * 1997-10-09 1999-09-21 Ethicon Endo-Surgery, Inc. Dual cam trigger for a surgical instrument
US6443968B1 (en) 1997-10-09 2002-09-03 Ethicon Endo-Surgery, Inc. Dual cam trigger for a surgical instrument
US20110232429A1 (en) * 2006-03-03 2011-09-29 American Grease Stick Company Hand operated gripping tool
US20090178518A1 (en) * 2006-03-03 2009-07-16 American Grease Stick Company Hand operated gripping tool
US20090056510A1 (en) * 2006-03-03 2009-03-05 American Grease Stick Company Hand operated gripping tool
US8561506B2 (en) * 2006-03-03 2013-10-22 American Grease Stick Company Hand operated gripping tool
US8677865B2 (en) 2006-03-03 2014-03-25 Nigel A. Buchanan Hand operated gripping tool
USD744306S1 (en) 2011-12-16 2015-12-01 Ags I-Prop, Llc Pliers with trigger
US9010222B2 (en) 2012-02-06 2015-04-21 Ags I-Prop, Llc Adjustable gripping tool
US20150007700A1 (en) * 2013-07-02 2015-01-08 Nigel Buchanan Plier apparatus
US20150013507A1 (en) * 2013-07-02 2015-01-15 Ibt Holdings, Llc Pliers apparatus
US9242350B2 (en) * 2013-07-02 2016-01-26 Nigel Buchanan Plier apparatus
US9272394B2 (en) * 2013-07-02 2016-03-01 Nigel Buchanan Pliers apparatus
US20160144488A1 (en) * 2013-10-04 2016-05-26 Nigel Buchanan Pliers apparatus
US9962813B2 (en) * 2013-10-04 2018-05-08 Nigel Buchanan Pliers apparatus

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